The melting of ice is favoured by ………….. pressure and ………….. temperature.

Options

A. Low T and P
B. High T and P
C. Low T high P
D. Low P high T

Answer

To solve the question "The melting of ice is favoured by ………….. pressure and ………….. temperature," we need to analyze the conditions that affect the melting of ice, which is an endothermic process.

### Step-by-Step Solution:

1. **Understanding the Process of Melting Ice**:
- Melting ice involves the transition from solid (ice) to liquid (water) and requires the absorption of heat. This process is endothermic, meaning it absorbs heat from the surroundings.

**Hint**: Remember that endothermic processes require heat to proceed.

2. **Applying Le Chatelier's Principle**:
- According to Le Chatelier's Principle, if a system at equilibrium is subjected to a change in temperature, pressure, or concentration, the system will adjust to counteract that change.
- In the case of melting ice, we can apply this principle to understand how temperature and pressure affect the equilibrium between ice and water.

**Hint**: Le Chatelier's Principle helps predict how changes in conditions affect equilibrium.

3. **Effect of Temperature**:
- For an endothermic reaction like melting ice, increasing the temperature will favor the forward reaction (melting). Therefore, higher temperatures will promote the melting of ice into water.

**Hint**: Higher temperatures favor endothermic reactions.

4. **Effect of Pressure**:
- At the melting point of ice (0°C), the density of water is greater than that of ice. Since ice occupies more volume than water, when ice melts, the volume decreases.
- According to Le Chatelier's Principle, if the volume decreases (as it does when ice melts), increasing the pressure will favor the reaction that produces less volume, which in this case is the melting of ice.

**Hint**: Decreasing volume favors the reaction; thus, increasing pressure will promote melting.

5. **Conclusion**:
- From the above analysis, we conclude that the melting of ice is favored by **high temperature** and **high pressure**.

**Final Answer**: The melting of ice is favored by **high pressure** and **high temperature**.

### Summary of the Correct Option:
- The correct option is **B: high temperature and high pressure**.